Bug#378266: reduce confusion of bug numbers

[Peter Samuelson]

# Where in the world did 378266 come from?  It seems to have been
# cloned from 377467 for no reason at all, then merged with 376565 for
# no reason at all.
#
# People seem to be emailing 378266 as though it were 376565, but
# there's no history in the bug to indicate why they are doing this.
# This caused me several minutes of confusion while trawling through
# the BTS - please use 376565 if that's what you mean.
unmerge 378266
close 378266

reassign 376565 libsvn0
thanks